Navien NCB-150E Service Manual page 56

Component
Gradually increase / decrease the speed of
Fan the fan motor starting from 0 RPM to full
speed and back down to 0 RPM
Cycles the pump 10 seconds ON and 5
Pump seconds OFF five times. (Repeats five times
for a total of 75 seconds)
3-Way Valve will be turned On upon entering
<Test mode> and pressing the [+], [-] button
3-Way Valve
each time converts the state from On -> Off
or Off -> On
Dual Venturi will be turned On upon entering
<Test mode> and pressing the [+], [-] button
Dual Venturi
each time converts the state from On -> Off
or Off -> On
* Error Check Operation will return to Normal Operation condition after automatic test when selecting each operation mode (3-Way Valve and Dual Venturi will
be manually controlled)
Test Performed Display Method
The current APS value and the current RPM value are repeatedly
displayed at intervals of 2 seconds.
Displays On or Off according to pump status.
Whenever the [+], [-] button is pressed, the condition is toggled as
On -> Off or Off -> On
Whenever the [+], [-] button is pressed, the condition is toggled as
On -> Off or Off -> On
System Details 55